    {{.msg}}
    <form class="fr" method="POST" action="/modify/{{.Topic.Tid}}">
      <input type="text" name="title" placeholder="Please enter title." value="{{.Topic.Title}}">    
      <textarea name="content" rows="30">{{.Topic.Content}}</textarea>
      <input type="text" name="url" placeholder="Please enter a url." value="{{.Topic.Url}}">    
      <input type="submit" class="button" value="Modify"></form>